Energy Types & Conversions
What type of energy does a moving car have?
Kinetic energy
Name one fossil fuel.
Coal, oil or natural gas
What are the three methods of heat transfer?
Conduction, convection and radiation
Name one way to keep a house warm.
Loft insulation, double glazing, cavity wall insulation or draught excluders
What instrument measures temperature?
Thermometer
What type of energy is stored in food?
Chemical energy
Name two renewable energy sources.
Wind, solar, hydroelectric, wave, geothermal or biomass
What method transfers heat along a metal spoon in hot soup
Conduction
What is the purpose of loft insulation?
To reduce heat loss through the roof
What instrument measures the voltage produced by a wind turbine?
Voltmeter
What two main types of energy does a light bulb produce?
Light and heat energy
Why are fossil fuels called non-renewable?
They take millions of years to form and cannot be replaced quickly
What happens to warm air during convection?
It rises because it becomes less dense
Which surface is better at emitting heat radiation: matt black or shiny silver?
Matt black
Name one thing you could change when investigating a wind turbine.
Number of blades, blade angle or blade profile
What type of energy is stored in a stretched elastic band?
Strain energy (elastic potential energy)
What happens to the voltage produced by a wind turbine when wind speed increases?
It generally increases
How does heat from the Sun reach Earth?
Radiation
Why does double glazing help keep a house warm?
The gap between the glass panes reduces heat transfer
Why should scientists only change one variable during a fair test?
To ensure any change in the results is caused by the variable being investigated
Complete the statement: Energy cannot be created or destroyed, only…
Transferred or converted from one form to another
Give one advantage and one disadvantage of nuclear power.
Advantage: low CO₂ emissions during operation. Disadvantage: radioactive waste or high construction costs
Why can radiation travel through space but conduction and convection cannot?
Radiation does not require particles, but conduction and convection do
What is a Passivhaus building designed to do?
A Passivhaus is a building designed to keep heat inside during winter and prevent overheating in summer. It uses special insulation, high-quality windows and airtight construction to reduce energy waste.
A cup of water cools from 80°C to 55°C. What is the temperature decrease?
25°C